What persistent information is a Jini service required to maintain?

Tim Rohaly

The Jini specifications require that services maintain some state information across service crashes and restarts. This persistent state includes:

  • The service ID. Once a service ID is acquired, that same service ID must be used each time the service registers with a lookup service. A service ID allows the service to be uniquely identified.
  • The set of service attributes that were used when registering the service. Clients may look up services by matching attributes, so a service must ensure that it registers with the same set of attributes in all lookup services.
  • The set of lookup groups the service has joined. The service should participate in the same groups when restarted.
  • The set of lookup services in which the service should register using unicast discovery.
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